A large fire engulfed a terminal owned by Pakistan's largest oil marketing firm in the southern city of Karachi before it was put out on Sunday but authorities said it was unlikely to hit the country's oil supplies. Officials at Pakistan State Oil (PSO) said work at a lubricant manufacturing terminal near the National Refinery Ltd., Pakistan's biggest oil refinery, had been suspended since the fire broke out at around midnight Saturday. Television footage showed huge flames burning in darkness. PSO managing director Jalees Ahmed Siddiqi said three small sections in the sprawling terminal were damaged, including a storage house for finished goods. Siddiqi said PSO ran another lubricant manufacturing terminal in Karachi and was confident oil supplies would remain uninterrupted. "We have enough stocks in the country and, God willing, there will be no impact on our supplies," he told Reuters. PSO controls almost 70 percent of Pakistan's petroleum marketing business Siddiqi said investigations were under way to determine the cause of the fire. Four firemen were slightly injured while trying to extinguish the fire. "We have controlled the fire and now we are trying to put out smoulders," Kazim Ali, Karachi's chief fire officer, told Reuters.